Copy-holder.



F. G. YAWMAN.

COPY HOLDER.

APPLICATION FILED JULYZ, 1917- O 1 O Q SA WA flmrmnttanrg 2 SHEETS-SHEET2,

F- G. YAWMAN,

COPY HOLDER.

APPLICATXON FILED JULYZ, I917.

Patented Apr, 16,

5 7 av 7 l 1 h fi 3 I o HHILNUJHI w u M M v I m w :"d m WM 2 m H m 0 H.w 2 fl 4 MM 1 a a 3 w 1/ 2 3 "W 0 5/ QM Q o on emu FREDERICK G. YA, OFROCHESTER, NEW Y0 3:. ii;

- COPY-HOLDER.

Specification of Letters latent.

Application filed July 2, 1917. Serial No. 178,186. I

To all whom it may concern:

Be it known that I, FREDERICK G. YA MAN, a citizen of the United States,and resident of Rochester, in the county of Monroe and State of NewYork, have invented certain new and useful Improvements in Copy-Holders,of which the following is a specification.

The present invention relates to copy holders and more particularlytothe type in which a line guide and a work support are relatively movableso that successive lines on the work may be indicated by the line guide,an object of this invention being to provide an improved'means foreffecting the relative movement between the line guide and the worksupport whereby any desired line spacing-may be obtained and the movingpart may be readily returned toits initial position. I Another object ofthe invention is to provide an improved means for absorbing the shocksdue to the return movement of v the moving part.

To these and other ends the invention consists of certain parts andcombinations of parts all of which will be hereinafter dey scribed, thenovel features being pointed out in the appended claims. In the drawingsFigure 1 is a front view of a copy holder embodying the presentinvention;

Fig. 2 is a horizontal section through the copy holder;

Fig. 3 is an enlarged detail view of the elevating means of the copyholder;

F Fig. 4 is a vertical section on the line H, 1g. 3;

Fig. 5 is a vertical section on the line 55,

Fig.2;and i V Fig. 6 is an enlarged sectional view showing thecoiiperation between the bumper at the upper. portion of the stationaryframe and the movable copy holder.

While the invention is herein illustrated as embodied in a constructionin which the work support moves with relation to the line guide, it willbe understood that l[ do not limit myself to this arrangement.

In the illustrated embodiment of the invention there is employed astationary frame comprising preferably a base member 1 having guides 2extending upwardly therefrom in parallel relation, said guides being inthe form of rods, secured at. their lower ends to the base member 1, andconnected at their upper ends by a cross-piece 3, the latterbeingPatented Apr. 16, 11ers.

formed from sheet metal and rolled at its ends to form tubes 4:surrounding reduced portions 5 at the upper end of the rods 2. Theloweredge of this cross-piece 3'is bent rearwardly at 6, and has aswinging member 7 pivoted thereto at 8 and extending in rear of theframe. A second member 9 is pivoted to the member 7 at 10, and has aline guide 11 pivoted thereon at 12, the member 9 being arranged to liein front of the stationary frame so as to position the line guide infront of said frame.

Operable on the stationary frame is the movable work support 13, thelatter preferably being formed from sheet metal and having its oppositeedges rolled at-14 to provide guides operating on the guide rods 2. Awork clamping device 15, which is not herein claimed but forms thesubject matter of another application, is arranged at the upper portionof the work support 13, while a loop 16 is provided at the upper end ofthe.

work support for securing those leavesof the work which are swungupwardly over the edge of the work support.

The mechanism for producing a relative movement between the work supportand-the line guide, in this instance, embodies an operator 17 preferablyin the form of a hand wheel on a shaft 18, which is mounted to turnwithin the forward extension. 19 on the base member 1. At its rear end,the shaft 18 is provided with a friction gear wheel 20, the latterengaging within the grooved periphery of a friction gear wheel 22 whichis journaled on a stub shaft 23 artranged on the base member 1 in. rearof the guides 2. Connection between the friction wheel 22 and the worksupport 13 is preferably established by a, .flexible connector 24, inthis instance in the form of a tape piece about the friction wheel 22preferably in Y the groove of the latter and extending from said wheelupwardly over a grooved pulley 25 journaled at 26 in the upperiportionof a hollow standard 27, which projects upwardly from the base member 1between the guides 2. From the pulley 25the flexible connector 2t leadsto and is connected with a, bracket 28 which is secured to the rear faceof the work support 13 near the lower edge of the latter. It is apparentthat when the opera- I .tor 17 is turned in the direction of the arrow,Fig. 1, the tape 24 will be wound on the drum and friction wheel 22, andwill ele'-. veto the work support 13.

With the object in view of preventing the descent of the work support 13except when desired, the shaft 18 carries a toothed wheel 29 with whichcooperate two pawls or dogs 30 and 31 mounted to turn on a common axisformed by a screw bolt 32 secured in the stub shaft 23. The respectiveteeth 33 and 3 1 of the dogs 30 and 31 are located at differentdistances from the common pivot of the dogs, so that the dogsalternately engage the ratchet wheel 29, thus permitting .the worksupport .to partake of a finer adjustment than would be possible withonly one dog.

To permit the descent of the work support 13 the friction wheels 20 and22 act as a make-and-break, motion-transmitting connection between thework support and the rotary operator 17, and to this end one of saidwheels has a movement transversely of its axis relatively to the otherwheel. This is accomplished, in this instance, by laterally widening thebearing at the inner end of the shaft 18, as-at 35 Fig. 5. Normally theshaft 18 is held toward the friction wheel '22 by a spring 36 which is,in this instance, formed of a coil secured at one end at 37 to the shaft18, and at the other end to the screw 32. The lowering of the worksupport is effected 'by attempting to turn the operator 17counterclockwise, or in a direction opposite that of the arrow shown inFig. 1. This causes the shaft 18 to move laterally in the bearingenlargement 35, due

to the engagement of one of the teeth 33 or 34: cooperating with thetoothed wheel 39 and acting as a fulcrum. With the lateral movement ofthe shaft 18, the friction wheel 22 is freed and the work support 13descends under its weight. This descent may be stopped at any time byreleasing the operator 17 to permit the spring 36 to throw the friction-wheel 20 into contact with the friction wheel 22.

Retardation of the descent of the work support 13 may be effected by aspring 38 preferably in the form =of a volute coil arranged within "thedrum or friction wheel 22, and havingits inner end secured at 39 to.said wheel, and its outer end secured at 40 to a'screw which is fixed inthe base member 1. A cover plate 411 may be'em ployed for inclosing thespring within the drum or friction wheel 22, said cover plate being heldagainst rotation by the screw 40, and at the same time surrounding thestub shaft 23.

To prevent jar at the extreme lower limit of the work support, thestationary frame is preferably provided, with two lenders, in thisinstance, in the form of rubber pieces 42 fitted in the upper ends oftubes t of the cross piece 6, so as to cooperate as the latter letreaches the lower limit of its movement with a head of -abutmentsituated on the rear face of the work support near the upper ed e of thelatter. v

rom the foregoing it will be seen that there is provided a copy holderin which the elevating means is controlled by an operator which isrotated in but one direction, said operator having a second movement torelease the work, the operator being secured to a rotary shaft which isshifted laterally on said second movement of the operator to throw twogears out of cooperation. Counterbalancing means for the moving part isconnected to one of said gears, and buffers are arranged so that anefiective stop of the work support is secured without any rebound.

The feature of providing a make-andbreak, motion-transmitting connectionbetween a rotary operator and the moving part of the copy holdercontrolled by the rotary operator is not claimed broadly herein, butforms the subject matter of an application filed by me on April 17,1916, Serial No. 91,584. I

What I claim as my invention and desire to secure by Letters Patent is:-

1. In a copy holder having a work support and a line guide; means foreffecting relative movement between the work support and the line guidecomprising two cooperating rotary gears, means for holding one of saidgears from turning in one direction, means connecting the other gear toi part of the copy holder and the rotary shaft,

controlled by the transverse movement of the shaft.

3. In a copy holder having a work supportand a line guide; means foreffecting relative movement between the work support and the line guidecomprising a rotary shaft having a transverse movement, a

ratchet on the shaft, a pawl cooperating with the ratchet and mountedindependently of the shaft, and a make-and-break, motiontransmittingconnection between the moving part of. the copy holder and the shaft,controlled .by the transverse movement of the shaft produced through theengagement of the pawl on the reversing of the rotatihn of the shaft.

t. In a copy holder having a work support and a line guide; means forefiecting a relative movement between the work sup- 13i port and theline guide comprising a rotary operator, a shaft on which said operatoris mounted having a transverse movement at one end, a ratchet wheel onthe shaft, a pawl mounted independently of the shaft and engaging theratchet wheel, a gear on the shaft, and a gear independently mounted,connected to the moving part of the copy holder and adapted to bedisengaged by the gear on the shaft when the latter is moved laterallywith the shaft.

5. A copy holder as set forth in claim 4 combined with a spring normallytending to resist the transverse movement of the shaft to hold the twogears in cooperation.

1.6. In a copy holder having a work support and a line guide; means foreffecting relative movement between the work support and the line guidecomprising a flexible connector secured to the moving part, a

grooved wheel in which said flexible connect'or is wound, and a gearadapted to fricframe, a work support guided vertically on v the frame, abumper arranged at the ,top of the stationary frame and an abutmentonthe work support at a point nearer the top of the work support than thebottom.

FREDERICK G.

